I think 15 for GWD is not bad, and you still have time. I would do either 40 SC, 10 RC, or 20 CR in a row for each time block. I found that most beneficial for me. It also took me a long time to summarize the question types on my second round review, but think it is worthy.
BTW, I will take the exam on Oct. 6. Good luck to all of us!